Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "weir apparent", "hair apparent", "heir apparently", "heir aparente", "heir apaparente", "heir apparental"
"heir aparentes" » "huir aparentes", "weir aparentes", "hair aparentes", "heir aparente", "heir parente", "heir parientes", "heir aaparentees", "heir aparentales"
"heir parent" » "huir parent", "weir parent", "hair parent", "heir aparente", "heir parental"
"her apaparenteal" » "her apaaparenteeal", "her apaparentaleal"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"heir apparent\") OR (\"her apaparenteal\"))) OR (\"heir aparentes\"))) OR (\"heir parent\"))~".
• Removing quotes may allow a broader search: (((((( heir apparent ) OR ( her apaparenteal ))) OR ( heir aparentes ))) OR ( heir parent ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("heir apparent") OR ("her apaparenteal"))) OR ("heir aparentes"))) OR ("heir parent"))*.